Seam Sealers | McMaster-Carr

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For Use On

3D Printer Extruder Heating Elements

Bricks

Electrical Components

Electronics

Grout

Hard-to-Bond Materials

Color

For Joining

System of Measurement

Maximum Temperature

Manufacturer

Container Size

Type

Manufacturer Model Number

Material

Calcium Sulfate (Gypsum)

Formulation

Calcium Sulfate (Gypsum)

Methyl Isobutyl Ketone (MIBK)

Environment

For Use Outdoors

Begins to Harden

Mixing Required

For Use With

Consistency

Performance

Electrically Insulating

EMI Shielding

Expandable

Fast Harden

Reaches Full Strength

Minimum Temperature

REACH

RoHS

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

1A995

1C995

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Exempt

Forward

How can we improve?

2,262 Products

Sealants

Structural Sealants

Combine the strength of adhesive with the flexibility of sealant

14 products

All-Weather Application Structural Sealants

The strongest all-weather sealants we offer

6 products

Silicone Rubber Sealants

Harden at room temperature once applied

44 products

Mildew-Resistant Silicone Rubber Sealants

Resist mold and mildew in high-humidity environments

10 products

Self-Leveling Silicone Rubber Sealants

Thinner than non-sagging silicone sealants to flow easily into cracks for a smooth finish

5 products

Structural Submersible Sealants

The strongest submersible sealants we offer

4 products

Sealants

Fill and seal gaps in metal, plastic, wood, and other materials

12 products

Self-Leveling Sealants

Thinner than non-sagging sealants to flow easily into cracks for a smooth finish

1 product

Oil- and Fuel-Resistant Sealants

Resist swelling when exposed to oil, fuel, and solvents

3 products

Submersible Sealants

Stand up to water, salt spray, mildew, and UV light

9 products

Non-Hardening Caulk

Stays pliable while keeping out moisture

11 products

Low-Outgassing Silicone Rubber Sealants

Release almost no volatile emissions that could damage sensitive electronics, even in a vacuum

2 products

Self-Leveling Oil- and Fuel-Resistant Sealants

Flow easily into cracks for a smooth finish and resist swelling from oil, fuel, and solvents

5 products

Chemical-Resistant Sealants

Made of fluoroelastomer to resist harsh chemicals, such as sulfuric acid

4 products

Puncture-Resistant Sealants

Resist punctures, cuts, and abrasion from heavy wear and tampering

4 products

Self-Leveling Chemical-Resistant Sealants

Flow easily into cracks for a smooth finish and resist harsh chemicals, such as sulfuric acid

5 products

Vacuum Leak Sealants

Seal leaks in vacuum systems and components

5 products

Structural Silicone Rubber Sealants with Material Certification

Stronger than standard silicone sealants

2 products

Noncorrosive Silicone Rubber Sealants

Won't discolor copper, brass, or concrete

13 products

Caulk

Seal and fill cracks and voids

9 products

All-Weather Application Sealants

Apply on wet surfaces and in cold temperatures

9 products

Structural Silicone Rubber Sealants

Stronger than standard silicone sealants

4 products

Oil-Resistant Sealants

Won't degrade from exposure to oil

3 products

Membrane Sealants

Keep water out of single-ply PVC or TPO plastic membranes

2 products

Optically Clear Sealants

Let light pass through for use with solar cells and fiber optics

2 products

Structural Noncorrosive Silicone Rubber Sealants

Our strongest noncorrosive sealants

3 products

Noncorrosive Silicone Rubber Sealants with Material Certification

Won't discolor copper, brass, or concrete

1 product

Removable Caulk

Peel off when no longer needed for a temporary seal

1 product

Silicone Rubber Sealants with Material Certification

Harden at room temperature once applied

9 products

Clean Room Sealants

Won't contaminate the air or surfaces in semiconductor, biomedical, and electronics clean rooms

1 product

Structural Oil- and Fuel-Resistant Sealants

Our strongest oil- and fuel-resistant sealants for assembling and repairing fuel systems and tanks

2 products

Acoustical Sealants

Block sound from passing through gaps and joints where walls, floors, and ceilings meet

1 product

Caulking Tape

Press into place for an immediate, light duty seal

1 product

Create-a-Color Caulk

Mix with water-based paint to match the color of your surface

2 products

Metal- and X-Ray-Detectable Structural Noncorrosive Silicone Rubber Sealants

Locate a piece if it falls in your food line using metal detectors and X-ray machines

1 product

Optically Clear All-Weather Application Sealants

Apply in cold and wet weather and let light pass through for use with solar cells and fiber optics

1 product

Self-Leveling Silicone Rubber Sealants with Material Certification

Thinner than non-sagging silicone sealants to flow easily into cracks for a smooth finish

1 product

Concrete Joint Sealants

Self-Leveling All-Weather Application Concrete Joint Sealants

Apply in wet and cold weather and flow easily into cracks for a smooth finish

6 products

High-Strength Self-Leveling Concrete Joint Sealants

Flow easily into cracks for a smooth finish and withstand wear and tear in high-traffic areas

10 products

All-Weather Application Concrete Joint Sealants

Apply on wet surfaces and in cold temperatures

2 products

High-Strength Concrete Joint Sealants

Stand up to heavy wear and tear, such as steel wheel traffic

7 products

Concrete Joint Sealants

Seal joints and gaps in concrete

4 products

High-Temperature Concrete Joint Sealants

Form a durable, rock-hard seal after firing for use in ovens and kilns

4 products

Self-Leveling Concrete Joint Sealants

Thinner than non-sagging concrete joint sealants to flow easily into cracks for a smooth finish

4 products

$Textured Concrete Joint Sealants$

Textured Concrete Joint Sealants

Textured to match concrete surfaces

2 products

HVAC Sealants

Metal Duct HVAC Sealants

Seal metal-to-metal joints in ductwork

2 products

HVAC Sealants

Form water-resistant seals on metal, plastic, and rubber joints in HVAC applications

3 products

Glass Sealants

UV-Resistant Glass Sealants

Won't degrade in sunlight

4 products

Structural Glass Sealants

Support glass under heavy loads in equipment and buildings

2 products

Glass Sealants

Install glass in aluminum, steel, and wood framing

5 products

Fire-Rated Glass Sealing Tape

Seal glass windows in metal and wood fire-rated doors

3 products

Impact-Resistant Structural Glass Sealants

Withstand impact within hours of application for repairing vehicle and equipment windows

4 products

Glass Sealing Rope

Press into place to seal leaks and hold glass in window frames

1 product

Roof Joint Sealants

All-Weather Application Roof Joint Sealants

Fix roof leaks even in cold and wet weather

2 products

Roof Joint Sealants

Seal roof joints to keep out the elements

3 products

Self-Leveling Roof Joint Sealants

Thinner than non-sagging roof joint sealants to flow easily into cracks for a smooth finish

3 products

Edge Sealants

Prevent the edges of tape, signs, and graphics from peeling by sealing out water and debris

2 products

Other Products

Structural Adhesives

Strong enough to replace screws and rivets for many jobs

165 products

Gasket Makers

Seal irregular shapes and tiny crevices by applying a bead that hardens into a gasket

58 products

Instant-Bond Adhesives

Also known as super glue, these adhesives create strong bonds in under 90 seconds

162 products

Cartridge Sealing Caps

Slip over the tips of adhesive and sealant cartridges to keep contents from hardening

1 product

Contact Adhesives

Apply adhesive, air dry, and bring surfaces together to bond

52 products

Caulk Guns

Cartridge, sausage-pack, and bulk-load caulk guns

62 products

Adhesive Cement

Form strong bonds on plastic, rubber, ceramic, and other materials

25 products

Protective Coatings

Shield surfaces from the surrounding environment

155 products

Surface Fillers

Repair chips, cracks, and tears in various surfaces

116 products

Repair and Duct Tape

Permanently join or seal surfaces

45 products

Gasket Tape

Seal openings such as those around windows, enclosures, and pipe flanges to prevent leaks

94 products

Potting Compounds

Encase electronic assemblies in material that hardens to protect from dust, moisture, and vibration

82 products

Seam Rollers

Press down the seams where wall coverings meet for a smooth, continuous appearance

7 products

Masking Tape

Temporarily join or protect surfaces

2 products

Zinc-Plating Kits

Create your own zinc-plating system to add corrosion resistance to steel and iron parts

3 products

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

182 products

Threadlockers

Coat threads on threaded fasteners to prevent loosening from impact and vibration

166 products

Backer Rods

Insert into gaps before caulking to reduce how much sealant you need and improve adhesion

35 products

Adhesive Primers

Prepare surfaces before adding adhesives to improve bonding strength

19 products

Thermal Paste

Mold heat cable to pipe, eliminating air gaps that lead to heat loss and heater failure

18 products

Inner Tubes

Pair with a matching tire for a smooth ride

14 products

Adhesive Accelerators

Speed up the time it takes adhesives to reach full strength

12 products

Glue Guns

Melt and dispense hot-melt glue

19 products

Gasket Sealants

Seal gaskets on metal parts

11 products

Weld-Backing Tape

Stick to the back of welding seams to contain spatter and prevent gases from weakening the weld

11 products

Backer Rod Insertion Tools

Quickly set foam backer rods in caulk joints at a consistent depth without puncturing them

2 products

Adhesive and Sealant Assortments

A collection of adhesives for routine maintenance and quick repairs

1 product

Retaining Compounds

Fill gaps to bond shafts, bearings, press-fit assemblies, and other cylindrical metal parts

80 products

Adhesive Dispensing Gun Nozzles

Pair with cartridges in dispensing guns to control the flow of adhesive

75 products

Fire Stops

Prevent fire and smoke from passing through holes in fire-resistant walls and floors

59 products

Hot Glue

Melt for rapid bonds in a range of applications, from packaging to woodworking

17 products

Mounting Tape

Mount everything from signs and panels to carpet and padding

26 products

Conformal Coatings

Secure and insulate components on circuit boards and other electronics

31 products

Construction Adhesives

Join a wide range of construction materials, from drywall to carpeting

17 products

Casting Metals

Melt and pour into molds to make metal parts and prototypes

19 products

Glue

The first choice for everyday bonding and repairs

15 products

Sealant Primers

Apply to surfaces before sealant to speed up drying times and improve adhesion

9 products

Caulk Gun Nozzles

Attach to caulk guns to change the shape and amount of sealant that's dispensed

12 products

Electrically Insulating Adhesives

Secure hardware on circuit boards while insulating current

12 products

Anchoring Adhesives

Permanently set threaded rods, studs, and rebar in concrete

18 products

Roof Coatings

Form a water-resistant layer to restore and reinforce your roof

10 products

Adhesive Dispensing Gun Cartridges

Fill and then mount in dispensing guns to apply adhesives to surfaces

34 products

Blackener Kits

Create a flat, black protective finish on metal tools to resist corrosion and reduce glare

13 products

Tire Sealants

Prevent tire punctures or plug them on the spot

6 products

Wood Stains

Refresh and protect the appearance of wood surfaces by staining and sealing them

1 product

Fabric Coatings

Preserve the appearance of fabric by blocking liquids and UV rays

4 products

Solder Mask

Temporarily shield circuit boards from solder, flux, and high temperatures

4 products

Magnet-Receptive Sheets

Cut with scissors to form custom nonmetallic, nonmagnetic surfaces that magnets will stick to

3 products

Mounting Adhesives

Mount objects with a range of adhesives, including glue-on-a-roll and glue shapes

3 products

Plumber's Putty

Mold into a watertight, removable seal around faucets and drains

3 products

Drum Patches

Patch drum leaks to prevent their contents from spilling

2 products

Drywall Tape

Apply to seams and corners before spreading drywall compound for a finished appearance

3 products

Leather Conditioners

Recondition, waterproof, and preserve leather; also known as neatsfoot oil

2 products

Leather Lubricants

Extend the life of leather; also known as castor oil

2 products

Polish

Clean, shine, and protect hard surfaces

2 products

Protective Coating Primers

Prepare metal surfaces for powder coating

2 products

Sealant Removers

Clean sealant and caulk off tools and other surfaces

2 products

Spray Foam Insulation

Expands to fill in cracks, gaps, and other hollow spaces for a tight seal against drafts and heat

3 products

Tank Patches

Spin with a handheld electric router to seal holes in plastic tanks and containers

4 products

Tube Dispensers

Squeeze all the contents out of tubes

2 products

Anodizing Kits

Coat aluminum parts for added resistance to corrosion and chemicals

5 products

Foam Insulation Coatings

Shield foam pipe insulation from moisture, UV rays, and ozone

1 product

Protective Clothing Tape

Patch rips and seal gloves, boots, and respirators to clothing

1 product

Roof Brushes

Apply thick roof coatings and patches

1 product

Thermal Control Coatings

Give off almost no volatile emissions that could damage sensitive electronics and optics

1 product

Touch-Up Paint Pens

Cover scratches in paint and coatings

1 product